instaling elgg in debian lenny ispconfig3.0.1.1 help

[pinguinito]

Elgg couldn't select the database 'c0_elgg', please check that the database is created and you have access to it.
I got this, i chek the data, and i tried to change c0_elgg to c0elgg how it say in my ispconfig but still the same messinger

Elgg couldn't select the database 'c0_elgg', please check that the database is created and you have access to it.

[till]

And you are able to login with phpmyadmin with the database user and password that you created for this database?